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POChild object is null during Jackson serialization?
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  1. POChild object is null during Jackson serialization?
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    copied!<p>I captured the json response and I see that it is {"page":"1","total":"2","records":"15","rows":[{"id":1,"firstName":"John","lastName":"Smith","username":"john","password":"21232f297a57a5a743894a0e4a801fc3","role":null},{"id":2,"firstName":"Jane","lastName":"Adams","username":"jane","password":"ee11cbb19052e40b07aac0ca060c23ee","role":null},</p> <p>My User and Role classes are super simple, so I think I must be overlooking something trivial.</p> <pre><code>@Entity(name="user") public class User implements Serializable { /** * */ private static final long serialVersionUID = 1L; @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; private String firstName; private String lastName; @Column(unique=true) private String username; private String password; @JsonIgnore @OneToMany(mappedBy="user", cascade={CascadeType.PERSIST, CascadeType.MERGE},fetch =FetchType.EAGER) private List&lt;Role&gt; roles = new ArrayList&lt;Role&gt;(); public List&lt;Role&gt; getRoles() { return roles; } public void setRoles(List&lt;Role&gt; roles) { this.roles = roles; } @ManyToOne private Role role; public User() {} public User(String username, String password, String firstName, String lastName, Role role) { this.username = username; this.password = password; this.firstName = firstName; this.lastName = lastName; this.role = role; } public User(String username, String firstName, String lastName, Role role) { this.username = username; this.firstName = firstName; this.lastName = lastName; this.role = role; } public User(String username) { this.username = username; } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getFirstName() { return firstName; } public void setFirstName(String firstName) { this.firstName = firstName; } public String getLastName() { return lastName; } public void setLastName(String lastName) { this.lastName = lastName; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public Role getRole() { return role; } public void setRole(Role role) { this.role = role; } } @Entity(name="role") public class Role implements Serializable{ /** * */ private static final long serialVersionUID = 1L; @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; @JsonIgnore @ManyToOne @JoinColumn (name = "user_id", nullable= true) private User user; private Integer role; public Role() {} public Role(Integer role) { this.role = role; } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public User getUser() { return user; } public void setUser(User user) { this.user = user; } public Integer getRole() { return role; } public void setRole(Integer role) { this.role = role; } } </code></pre> <p>I tried also </p> <blockquote> <p>@JsonUnwrapped @ManyToOne private Role role;</p> </blockquote> <p>but that's even worse because in this case my json doesn't have the role at all. {"id":1,"firstName":"John","lastName":"Smith","username":"john","password":"21232f297a57a5a743894a0e4a801fc3"},</p>
 

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